Finding the Fourth Proportional to 1,436.40, 2,141.98 and 1,322.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.40 : 2,141.98 = 1,322.80 : x
2. Step 2: Convert to fraction form
   1,436.40/2,141.98 = 1,322.80/x
3. Step 3: Cross multiply
   1,436.40x = 2,141.98 × 1,322.80
4. Step 4: Simplify right side
   1,436.40x = 2,833,402.48
5. Step 5: Solve for x
   x = 2,833,402.48/1,436.40
6. Step 6: Final answer
   x = 1,972.57